THE TRIPLETS
He at once resumed the inquiry, and placing his hand kindly on the head of the second triplet he now addressed the first in the following way:—
'Let us suppose for the moment that you happen to know which of your sisters this particular one really is, who, in that case, would the third one be, if she (the third) were not Mellinid?'
'Either Edil or the Duchess,' promptly replied the intelligent child.
'Quite right,' said the King encouragingly, 'Now as this is not so, and you certainly do not know which of your sisters this one happens to be, the reverse must be true, so that if your other sister is neither Edil nor the Duchess, who must she be?'
'Mellinid, of course,' readily answered the child, and every one applauded and wondered at the wisdom of the King.
'It only now remains,' proceeded the King, addressing the first and second triplets ' to discover which of you is Edil and which the Duchess.' Placing his hand once more upon the head of the second triplet, he again addressed the first.
'Suppose, for the sake of argument, that this sister of yours whom we now know not to be Mellinid were Mellinid and Mellinid the Duchess, in that case you would assuredly be Edil. Now as you cannot suppose this sister to be Mellinid when you know she is not, and the Duchess is the Duchess and not Mellinid, then our supposition must be wrong and the reverse 62
